2003 grand prix se 3.1 ton of miles
The weather around here is 10-20F all the time right now.
Today I went out side to start my car heading to work. I started my car cranked over fine. so I then turned on the defroster on high to clear the winshield. I got a real bad vibration the entire time it was on.(to the point you can feel it through the steering wheel floorboard and everything else in the car) when I shut it off it sounded like someone was growling at me for a few seconds after I shut the defroster off. It does it when the floor and head vents are selected as well as the just the upper vents. Any ideas? Oh another thing just my driver side heat works passenger side is always cold.
